JP3770575B2 - Tape measure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tape measure in which a tape measure tape is manually wound into a case.
[0002]
[Prior art]
Conventionally, as a fast winding tape measure adopting a double speed structure with a planetary gear, there are those described in Japanese Utility Model Publication No. 57-41102, Japanese Utility Model Publication No. 4-242, registered utility model No. 3014783, and the like.
[0003]
In these prior arts, the aim is to solve problems such as double speed structure by planetary gear device, sealability of gearbox, workability, transmission force, etc. It is larger than the quick winding structure, requires a large opening in the center of the case, and requires a large and durable case frame. In addition, the double speed structure using planetary gears is assembled separately from the tape take-up reel, and is not integrated. Therefore, in terms of assembly workability, the output shaft of the gear box and the connecting hole of the tape take-up reel Annoying fitting was necessary.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a tape measure with good assembling workability and easy tape tape replacement.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is a tape measure in which a case having an entrance portion of a tape measure tape and an opening provided in a central portion, a mounting flange, a take-up reel supported on the inside of the mounting flange, A winder supported on the outside of the mounting flange and provided with a gripping portion, and a winding mechanism having an interlocking mechanism for transmitting the rotation of the winder to the take-up reel, wherein the take-up reel is rotated by the handle; One end of the take-up reel is attached to the take-up reel, and the take-up mechanism is removably attached to the opening by the attachment flange. It is what.
[0006]
According to a second aspect of the present invention, in the tape measure according to the first aspect, the attachment flange has a collar-like fitting portion formed inside thereof, and the collar-like fitting portion is fitted into the opening. It is characterized by this.
[0007]
According to a third aspect of the present invention, in the tape measure according to the first or second aspect, the mounting flange has a substantially circular hole, an internal gear is formed on a peripheral surface of the hole, and the winder is pivotally supported. The planetary gear thus engaged meshes with the internal gear, and the sun gear attached to the take-up reel meshes with the planetary gear.
[0008]
According to a fourth aspect of the present invention, in the tape measure according to the third aspect, the planetary gear is a two-stage gear having a different number of teeth.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an exploded view partially showing a cross section for explaining an example of an embodiment of a tape measure of the present invention. In the figure, 1 is a case, 2 is an opening, 3 is a screw hole, 4 is a take-up reel receiver, 5 is a tape measure, 6 is a take-up mechanism, 7 is a mounting flange, 8 is a take-up reel, and 9 is a winder. Reference numeral 10 denotes a gripping part, 11 denotes an interlocking mechanism, and 12 denotes a fixed screw. In addition, since the case 1 showed the inner part with the cross section, the outer peripheral part is not shown in figure.
[0010]
The case 1 is composed of two plates made of synthetic resin, these two plates are opposed to each other, and are screwed and integrated at a peripheral edge (not shown). One plate has an opening 2 and a screw hole 3 for screwing around the opening 2. The screw holes 3 are provided corresponding to the screw holes of the mounting flange described later, and a plurality of, for example, three are provided. The take-up reel receiver 4 is integrally formed inside the other plate, but this is provided for the stable rotation of the take-up reel and is not necessarily required. Inside the case 1, a tape measure tape 5 is accommodated, and is drawn out from a loading / unloading portion (not shown) of the case 1.
[0011]
A winding mechanism 6 is fitted into the opening 2 and fixed. The winding mechanism 6 includes a mounting flange 7, a winding reel 8 supported on the inside of the mounting flange 7, a winder 9 supported on the outside of the mounting flange 7 and provided with a grip 10, and rotation of the winder 9. Is connected to the take-up reel 8.
[0012]
Assembling the case 1 and the winding mechanism 6 includes inserting the winding mechanism 6 into the opening 2 of the case 1 and inserting the fixing screws 12 into the screw holes on the outer periphery of the mounting flange 7. This can be done by tightening the fixing screw 12 in the screw hole 3. A plurality of screw holes provided on the outer peripheral portion of the mounting flange 7 are desirable, and for example, it may be provided at three locations. When inserting the take-up mechanism 6, the end of the tape tape 5 is coupled to the take-up reel 8. With regard to the coupling structure, a slit is provided on a part of the peripheral surface of the take-up reel 8. An appropriate coupling structure can be employed, such as sandwiching the end portion of the tape measure tape in the slit.
[0013]
By rotating the winder 9 with the grip portion 10 of the assembled tape measure, the take-up reel 8 can be rotated and the tape measure tape 5 can be taken up.
[0014]
FIG. 2 is a cross-sectional view for explaining the first embodiment of the winding mechanism. In the figure, the same parts as those in FIG. 8a is a rotating shaft, 9a is a shaft, 13 is a screw, 14 is a planetary gear shaft, 15 is a planetary gear, 16 is a sun gear, 17 is an inner peripheral gear, 18 and 19 are meshing portions, and 20 is a rotating shaft.
[0015]
The winder 9 is supported so as to be fitted to a step portion provided on the outer surface side of the mounting flange 7, and the take-up reel 8 is supported on the peripheral surface on the inner surface side of the mounting flange 7. A shaft 9a projects from the center of the winder 9 and rotatably supports a rotating shaft 8a extending from the center of the take-up reel. In this manner, the winding mechanism 6 is assembled by attaching the screws 13 in a state where the winder 9 and the winding reel 8 are supported by the mounting flange 7. That is, the winding mechanism section 6 is assembled with only one screw, and can be easily disassembled by removing this.
[0016]
In this embodiment, the planetary gear 15, the sun gear 16, and the inner peripheral gear 17 are used as the interlocking mechanism described in FIG. The planetary gear 15 is rotatably supported by a planetary gear shaft 14 fixed to the winder 9, and meshes with an inner peripheral gear 17 formed on the inner periphery of the mounting flange 7 at a meshing portion 18, and the outer periphery of the rotary shaft 8a. The sun gear 16 formed on the surface meshes with the meshing portion 19. Therefore, when the winder 9 is rotated, the planetary gear 15 revolves and rotates while meshing with the inner peripheral gear 17 to rotate the sun gear 16 and rotate the take-up reel 8. One planetary gear 15 is shown in the sectional view. Of course, one is sufficient in principle, but two or three may be provided. In the case of two, it is preferable to arrange at an angular position of 180 °, and in the case of three, it should be arranged at an angular position of 120 °.
[0017]
The rotation ratio of the winding mechanism 8 to the rotation speed of the winder 9 of this interlocking mechanism is determined by the number of teeth of the inner peripheral gear 17 and the number of teeth of the sun gear 16. Since the number of teeth is larger than the number of teeth of the sun gear 16, the rotation of the winding reel 8 is accelerated by the rotation of the winder 9, and high-speed winding is possible.
[0018]
In addition, although the handle | steering-wheel-shaped holding part was shown in the figure as the holding part 10 which rotates the winder 9, it is not restricted to this. In this embodiment, the handle can be rotated by the rotation shaft 20 and can be folded.
[0019]
In this embodiment, the interlocking mechanism including the planetary gear 15, the sun gear 16, and the inner peripheral gear 17 can be brought into a state close to a sealed state by the inner surface of the winder 9 and the bottom surface of the take-up reel 8. It is possible to prevent the interlocking mechanism from being damaged due to the mixing of etc.
[0020]
Even if it is damaged, the unit can be easily replaced by removing the unit of the winding mechanism 6 from the case 1 and replacing the substitute.
[0021]
FIG. 3 is a cross-sectional view for explaining a second embodiment of the winding mechanism. In the figure, the same parts as those in FIGS.
[0022]
In this embodiment, the planetary gear 15 is a large and small two-stage gear, and the large-diameter gear portion is meshed with the inner peripheral gear 17 and the meshing portion 18. The small-diameter gear portion of the planetary gear 15 is meshed with the sun gear 16 at the meshing portion 19. The rotation ratio of the winding reel 8 to the rotation speed of the winder 9 is reduced by a ratio of the planetary gear (number of teeth of the small diameter gear portion / number of teeth of the large diameter gear portion). Therefore, the speed can be reduced more than the ratio determined by the number of teeth of the inner peripheral gear 17 and the number of teeth of the sun gear 16, and the rotational torque can be reduced by that amount. Suitable.
[0023]
FIG. 4 is a cross-sectional view for explaining a third embodiment of the winding mechanism. In the figure, the same parts as those in FIGS.
[0024]
In this embodiment, the planetary gear 15 is a large and small two-stage gear, and the small-diameter gear portion is meshed with the inner peripheral gear 17 and the meshing portion 18. The large-diameter gear portion of the planetary gear 15 is meshed with the sun gear 16 at the meshing portion 19. The rotation ratio of the winding reel 8 to the rotation speed of the winder 9 is accelerated by a ratio of the planetary gear (number of teeth of the large diameter gear portion / number of teeth of the small diameter gear portion). Therefore, it can accelerate more than the ratio determined by the number of teeth of the inner peripheral gear 17 and the number of teeth of the sun gear 16, and can wind up the tape measure tape at a higher speed.
[0025]
【The invention's effect】
As apparent from the above description, according to the present invention, the take-up reel unit supported by the mounting flange, the winder, and the interlocking mechanism for transmitting the rotation of the winder to the take-up reel are integrated to provide the take-up mechanism unit. By configuring and removably attaching the winding mechanism to the opening of the case, it is possible to provide a tape measure that is easy to assemble, repair, and replace the tape.
[0026]
Furthermore, by forming a collar-shaped fitting part inside the mounting flange and fitting the collar-shaped fitting part into the opening of the case, a thin and compact tape measure is obtained, and the mounting flange is substantially circular. High-speed winding is achieved by forming an internal gear on the peripheral surface of the hole, meshing the planetary gear supported by the winder with the internal gear, and meshing the sun gear attached to the take-up reel with the planetary gear. Can be made possible.
[0027]
Moreover, the freedom degree of a design can be raised by comprising a planetary gear with the two-stage gear with which the number of teeth differs.
[Brief description of the drawings]
FIG. 1 is an exploded view partially illustrating a tape measure for explaining an example of an embodiment of a tape measure according to the present invention.
FIG. 2 is a cross-sectional view for explaining a first embodiment of a winding mechanism.
FIG. 3 is a cross-sectional view for explaining a second embodiment of a winding mechanism.
FIG. 4 is a cross-sectional view for explaining a third embodiment of a winding mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Opening part, 3 ... Screw hole, 4 ... Winding reel receptacle, 5 ... Tape measure tape, 6 ... Winding mechanism part, 7 ... Mounting flange, 8 ... Winding reel, 8a ... Rotating shaft, 9 DESCRIPTION OF SYMBOLS ... Winder, 9a ... Shaft, 10 ... Gripping part, 11 ... Interlocking mechanism, 12 ... Fixed screw, 13 ... Screw, 14 ... Planetary gear shaft, 15 ... Planetary gear, 16 ... Sun gear, 17 ... Inner peripheral gear, 18, 19 ... meshing part, 20 ... rotating shaft.

Claims (4)

A case having an entrance portion of the tape measure tape and having an opening provided in the central portion;
A handle having a mounting flange, a winding reel supported inside the mounting flange, a winder supported outside the mounting flange and provided with a gripping portion, and an interlocking mechanism for transmitting rotation of the winder to the winding reel; A take-up mechanism that rotates the take-up reel;
One end is attached to the take-up reel, and the tape is housed in a tape measure tape that is housed so as to be able to be pulled out from the entrance / exit.
The tape measure characterized in that the winding mechanism is detachably attached to the opening by the attachment flange. 2. The tape measure according to claim 1, wherein a flange-like fitting portion is formed inside the mounting flange, and the collar-like fitting portion is fitted into the opening. The mounting flange has a substantially circular hole, an internal gear is formed on the peripheral surface of the hole, a planetary gear pivotally supported by the winder meshes with the internal gear, and is attached to the take-up reel. The tape measure according to claim 1 or 2, wherein a gear meshes with the planetary gear. 4. The tape measure according to claim 3, wherein the planetary gear is a two-stage gear having a different number of teeth.

Images